Page last updated Nov 17, 2015 @ 10:34pm

PowerShelter Kit II
(Compare with our new PowerShelter III here)

psk2-exhfan.jpg (51494 bytes) psk2-damper.jpg (52905 bytes) psk2seethru.gif (4738 bytes) PSK2-BMS2500-fanoutside.jpg (38957 bytes) PSK2-BMS2500-inletoutside.jpg (42827 bytes) PSK2-BMS2500-open.jpg (56598 bytes) PSK2-BMS2500clearance.gif (16616 bytes)
outlet shutter fan inlet shutter open dimensions
Installation in walk-in shed
(up to 13,000 watt generators)
Installation in Suncast BMS2500 series garden shed
(7,999 watt generators maximum)

Click thumbnail image above to enlarge

(NOTE: This kit includes parts to convert shed.  Shed & generator must be purchased separately.)

Generator Enclosure Kit
Converts most metal walk-in garden sheds
into an enclosure for your portable generator.
Works with Suncast model BMS2500 storage shed available from Lowes and other retailers.
Also works with similar Suncast model BMS3400 storage shed available from Home Depot.

Shed NOT included.  Obtain locally or from online retailers.
Metal sheds are available from

The PowerShelter™ Kit II is designed to convert most metal walk-in type garden sheds so they can house your portable generator outdoors for both storage and operation.  This kit also worked with the now discontinued Suncast GS2000 series shed.


Design Features

  • Weather protected design for storage, maintenance and operation of generator
  • High temperature cutout provided to automatically shutdown generator if fan cooling is lost (reduces chance for engine damage or fire if fan is blocked or stops running)
  • Large ventilation openings to dissipate engine and exhaust heat
  • Digital carbon monoxide detector and alarm included to warn of ventilation malfunctions (provided with kits for walk-in sheds only)
  • Vents with automatic louvers to keep out rain, birds, rodents and most insects.
  • Suitable for air-cooled gasoline, diesel, natural gas or propane fueled gensets.  Call if your engine is liquid cooled (has a radiator).
  • High capacity fan to cool engine
  • PowerShelter Kit can be used with recoil or electric start models
  • Fan and intake shutter powered from two spare 120VAC outlets on generator
  • Kit comes with detailed assembly and installation instructions
  • Wire cage fan guard that meets OSHA requirements is provided inside shed to reduce possibility for personal injury due to moving fan blades
  • High temperature furnace refractory board provided for mounting to inside wall to deflect hot exhaust gasses
  • Optional second screen guard can be installed sandwiched between fan and outlet shutter to prevent reaching through shutter from outside when fan is running

  • Most sheds can be locked to keep your generator secure from theft
Storing your generator in this shelter frees up storage space in your garage, shed or basement for other uses
  • Electrical plug connections are made in a dry weather-protected environment which reduces shock hazards during bad weather

Makes it easier to startup and connect your generator during a power outage because it is always ready to go -- no dragging generator outside during the outage or bad weather to use it.


PowerShelter™ Kit II comes with detailed assembly instructions.  After the shed is assembled the installation of the kit takes a few hours.  The major installation steps are:

  1. Select proper location of generator and vents in shed.

  2. Select method for routing power cable out of shed.

  3. Cut two square vent holes in shed walls.

  4. Install outlet shutter fan.

  5. Install intake shutter and motor operator.

  6. Route and connect all power wiring.

  7. Install high temperature cutout on generator and test for proper operation.

  8. Mount exhaust deflector or exhaust adaptor.

  9. Test generator along with fan and intake damper.


Technical Details

  Small non-walk-in Sheds
(and BMS2500, BMS3400 Sheds)
Large Walk-in Sheds

Generator ratings

up to 7kW up to 7kW 8-12kW

Exhaust Fan Rating

1/10 hp 1/10 hp 1/4 hp
Exhaust Fan
Shutter Size (nom.)*
16" square 16" square 20" square
Intake Shutter
Size (nom.)  
20" square 24" square 30" square
Approx Rated
Air Flow (cfm) 
1600 1900 3400
Amps @ 120V
(fan / intake shutter)
1.0 / 0.5 1.0 / 0.5 3.0 / 0.5
Power Required (VA)** 180 180 420

CO Monitor Included?

no yes yes

**Power requirements for fan motor plus motor-operator on intake shutter.  Derate generator wattage by this figure.
  *When framing a rough opening add 1/2" to these dimensions.  So, for a 16" square shutter frame the opening at 16.5" x 16.5".


We have designed this kit with safety in mind.  However, whenever fuel is used to operate an engine generator there is always a risk due to fire, exhaust gases and electric shock.  This kit will not eliminate those risks.  If a fire develops, metal sheds will not contribute to the spread of the fire but sheds made of flammable materials could feed a fire.  Therefore we recommend the use of sheds made of non-flammable materials.   WARNING -- failure to follow the directions for construction and use of this product can cause serious injury to persons and property.  Read all directions fully before attempting to modify your shed and use only as directed.  We DO NOT recommend that this kit be installed in any space that is part of a dwelling or attached to a dwelling.

If you need to prepare the mounting pad before delivery contact us for a pad layout and locate the pad as follows:
  * within easy wiring distance to your transfer switch
  * away from bedrooms and other rooms where engine noise could be annoying
  * at least 5 feet from any building opening such as windows, doors, vents, soffit vents, etc.
  * at least 5 feet from structures having combustible walls
  * at least 5 feet from combustible material
  * at least 5 feet clearance to any overhead structure, overhang, or tree
  * not under a deck
  * where exhaust cannot accumulate in any nearby occupied area
  * allows space to open front door and to move generator in and out
  * meets any additional requirements of your local codes and Fire Marshal

Metal garden sheds can be purchased locally at many home centers such as Lowes.  Costs start at about $230.00.  The Suncast BMS2500 storage shed can be purchased at Lowes.  The similar Suncast BMS3400 can be purchased at Home Depot.  But these are limited to generator sizes up to 7999 watts.  Note also that the Suncast sheds are made of plastic resin and will burn if exposed to fire.  And even though they have provision for a padlock they are not very theft resistant.  A determined thief during a power outage could break into the shed and steal the generator.

If you do not already have a transfer switch or panel you may click here to order one from our wide selection.  You will also need to obtain any necessary building wire and a junction box locally if you wish to hard wire from the transfer switch to the PowerShelter.

If you do not already have a portable generator, view our selection online by clicking here.




Item Number: PSK2
Price: $429
Price last updated 11/17/2015
Shipping Weight: 70 lbs.
This item normally ships in approximately 1-2 weeks or less.




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